Of Edison's six children, Charles became the most deeply involved with the family business. Edison intended Charles to succeed him as head of the business, so after studying "General Science" at MIT, Charles joined the staff of Thomas A. Edison, Inc. in 1913. An early test of his ability came during World War I, when he ran the day-to-day operations at West Orange, leaving his father free to conduct war-related research. Though Charles and his father disagreed on a number of issues, especially on the commercial viability of radio, he did gain full control of the business in 1926.